TOYOTA#ad - The pressure relief valve of a Genuine Toyota Oil Filter opens only when the filter is clogged allowing oil to flow to the engine. This clogging can restrict the flow of oil to the engine causing severe damage.

The valve on some non-genuine Toyota oil filters open at lower pressures, allowing unfiltered oil to the engine even when the filter is not clogged. Some non-genuine Toyota oil filters do not meet Toyota’s stringent specifications.

The pressure release valve: oil filters clog when exposed to excess contaminants. The anti-drainback valve: genuine toyota oil filters feature an Anti-Drainback Valve that prevents oil from draining out of the engine and into the oil pan. By comparison, a lesser quality element may clog over time, which could lead to engine seizure or other potential engine problems.

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